河南省平原区宿鸭湖水库贝类资源及其利用

本文是1985年10月至1988年8月对大型平源泊型水库－宿鸭湖水库贝类资源的研究。共采集到瓣鳃类33种，腹足类5种；其中25种瓣鳃类（含2个未定种）为河南省首次记录。库中贝类依环境和栖息其中优势种类的朱同，可以划分为4个分布区；在6667ha常年淹没区内，贝类生物量约为6670．08t，其中褶纹冠蚌占99．24％。该库单位面积生物量之高和褶纹冠蚌在贝类中占绝对优势的情况，在我国湖泊、水库中沿属首例。故在开发利用库中水产资源时应首先考试这一资源优势，对贝类开发综合利用。

ON MOLLUSC RESOURCE OF SUYAHU RESERVIOR IN THE PLAIN OF HENAN PROVINCE

The work was conducted from Oct. 1985 to Aug. 1988. 38 species, including 33Unionids and 5 of Gastropods, were collected, in which 7 species of Unionids werefrom Ruhe River outside the reservior. In the area of 6667 hectare that is submerged all the year round, the per hectarestanding crop of mollusc was 9064 in number and 1000kg by weight. Among these,Cristaria plicata made 93.74% in number and 99.23% in biomass. The standing cropof C. plicata was mainly accumulated in the last 5 years. The annual production ofC. plicata was 1059 tons in total (159 kg/ha.). Based on the environmental factors and dominant species, the distribution ofmollusc could be divided into 4 distinct districts. It is concluded that the conditions of the reservior are suitable for mollusc, espe-cially for C. plicata. For full exploitation of the molllusc resource, it is suggestedthat programs involving pearl culture, pearly-mussel production, shell and visceral massutilization be developed.